157285871609 has 2 divisors, whose sum is σ = 157285871610. Its totient is φ = 157285871608.

The previous prime is 157285871569. The next prime is 157285871623. The reversal of 157285871609 is 906178582751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128647755625 + 28638115984 = 358675^2 + 169228^2 .

It is a cyclic number.

It is not a de Polignac number, because 157285871609 - 2²⁴ = 157269094393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (157285861609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78642935804 + 78642935805.

It is an arithmetic number, because the mean of its divisors is an integer number (78642935805).

Almost surely, 2^157285871609 is an apocalyptic number.

It is an amenable number.

157285871609 is a deficient number, since it is larger than the sum of its proper divisors (1).

157285871609 is an equidigital number, since it uses as much as digits as its factorization.

157285871609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8467200, while the sum is 59.

The spelling of 157285871609 in words is "one hundred fifty-seven billion, two hundred eighty-five million, eight hundred seventy-one thousand, six hundred nine".